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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cassandra backup and restore procedures
Date Wed, 18 Nov 2009 18:30:04 GMT
On Wed, Nov 18, 2009 at 12:05 PM, Jon Graham <sjcloud22@gmail.com> wrote:
> Hello Everyone,
>
> Is there a recommended backup/restore procedure to be able to recover a
> failed node?

Until tickets 193 and 520 are done, the easiest thing is to copy all
the sstables from the other nodes that have replicas for the ranges it
is responsible for (e.g. for replication factor of 3 on rack unaware
partitioner, the nodes before it and the node after it on the right
would suffice), and then run nodeprobe cleanup to clear out the
excess.

> How does Cassandra keep track of a node's identity?

It stores it in the system table.

> Should a replacement node keep the same IP address/DNS name as the original
> node?

Yes.

> Does a node still receive data while a nodeprobe snapshot" command runs?

Yes.

-Jonathan

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